You can give Calpol and Nurofen at a dose it says on the packaging, both at the same time. Always gets done at a hospital ( my son ends up there often with high fevers and chest problems ) and it nearly always works.

However, with such a high fever the temperature is least of your worries. Any other symptoms?

If it's been a few days, do take her to GPs tomorrow. The main thing is for a doctor to listen to her chest and then you can have a peace of mind. If she sleeps and lets you sleep then wait for the morning, nothing much else can be done.If you don't get some sleep. you'll start asking horse questions too